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java运行异常的示例

时间:2025-04-02 20:52:06 java语言 我要投稿

java运行异常的示例

  NullPointerException:空指针异常类

  示例:

  package com.darkmi.basic;

  public class Test {

  public static void main(String[] args) {

  System.out.println(toUpper(null));

  }

  public static String toUpper(String str){

  return str.toUpperCase();

  }

  }

  异常信息如下:Exception in thread "main" java.lang.NullPointerException

  at com.darkmi.basic.Test.toUpper(Test.java:11)

  at com.darkmi.basic.Test.main(Test.java:6)

  ArrayIndexOutOfBoundsException:数组下标越界异常

  示例:

  package com.darkmi.basic;

  public class Test {

  public static void main(String[] args) {

  int[] a = {0,1,2,3};

  System.out.println(a[4]);

  }

  }

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